Rancho Santa Ana Botanic Garden, Los Angeles County, California, USA September 1, 2008 Size: ~1cm diameter
I'm guessing this is a mud dauber nest. Probably some sort of potter wasp. Any chance of recognizing the species? Eumenes bollii looks similar, but it could be that every species in the family builds nests like this.
Contributed by Elliotte Rusty Harold on 1 September, 2008 - 8:56pm Last updated 29 June, 2013 - 6:13pm